View Full Version : 818 splitter / diffuser installation instructions
Chef818
08-01-2025, 10:43 AM
Good morning, does anyone have instructions / tips on installing the splitter and diffuser. Did not receive any and when asking FFR I just get sent files such as “818R supplemental instructions”, thank you
Hobby Racer
08-01-2025, 05:49 PM
Never got any with mine either. You just have to "make it work". :p
Never got any with mine either. You just have to "make it work". :p
Same. I just mounted mine so I thought they looked good. But
Chef818
08-02-2025, 12:54 AM
Anything would help such as
what these aluminum parts are for
How far back or forward / spacing between the strakes on the diffuser
How far should the diffuser and splitter stick out
image0.jpeg217116
driveslikejehu
08-02-2025, 08:24 AM
I made my splitter; here's how I attached it. 2 bolts per side thru homemade spacers to those fender structures. Another bolt with spacers at the rear corners.
I have 2 sets of holes, one for ~4.5" out and one for ~3.5".
I also made my diffuser; similar to the FFR. I can get pics of its mounting if that will help.
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mikeb75
08-02-2025, 12:23 PM
Front splitter required fab work to make a rear brace.
Rear splitter just mocked it up and sank rivnuts into the chassis.
I used countersunk cone spacers and taper-headed bolts for all attachments.
https://www.summitracing.com/search/brand/allstar-performance/department/fasteners-hardware/product-line/allstar-performance-countersunk-washers/part-type/washers?fr=part-type&SortBy=Default&SortOrder=Ascending
But yes, no instructions provided - jut took a flyer.